WELCOME TO PACIFIC INTERNAL MEDICINE ASSOCIATES (PIMA) ... Our practice has switched to a new patient portal, FollowMyHealth. If you are already on our patient portal, you should have received an e-mail invitation to create a new account. ... Dr. Clinton Young 415-923-3101 ; Dr. May Yen Yau 415-923-3491 Dr. Arlene Keller ....